Welded lock joint for sheet piling



Feb. 21, 1933. A, FRlcKE 1,898,767

WELDED LOCK JOINT FOR SHEET FILING Filed Feb. 24, 1932 Invenior:

i 77nd? Patented Feb. 21, 1933 UNITED STATES PATENT OFFICE ARTHURFRICKE, OF DORTMUND, GERMANY, A SSIGNOR TO THE FIRM VEREINIGTESTAHLWERKE AKTIENGESELLSCHAFT, OF DUSSELDORF, GERMANY WELDED LOCK JOINTFOR SHEET FILING Application filed February 24, 1932, Serial No.594,854, and in Germany June 20, 1931.

In the lock-joints for sheet-piling there occur always stresses,independently from the fact ,whether the lock-joint is placed in theneutral axis or in the outer layer. Shifting,

5 or torsional movements of the sheets, one in relation to the other,however, influence the resistance coeflicient of the wall. For reasonsrelating to the processes of rolling and ramming, it is howeverimpossible to avoid lock-joints altogether. In most cases it is possibleto ram two or three sheets locked together. The joints of such a unitwhich is to be rammed at one and the same time, can be made by weldingor by some other means. In the case of welding, however, it has beenfound that the play-room which every lock- .joint must have for reasonsrelated to the rolling process, is a disadvantage. In order to bridgeover this play-room, the welding must be extensive and in the weldedseam there occur stresses due to shrinking which often give rise tocrevices in the seam.

The present invention eliminates these disadvantages in that theplay-room is bridged over by a wedge or a flat piece of iron. The wedgeis driven in, until the inner lock-parts come to lie entirely oneagainst the other. The wedge is then welded to both sheets. Thisconnection eliminates any longitudinal or transverse displacement andany torsional movement in the lock-joint. The wedges and the weldedseams need be arranged only at ,given distances one from the other. Inorder to avoid tensional stresses in the welded seam, counter-wedges canbe driven in, on the opposite side, at greater intervals, and thesecounter-wedges can also be welded on.

In the accompanying drawing an embodiment of the invention isrepresented, of which drawing Figure 1 shows one form of the lock-joint, and

Figure 2 shows another form of the lockjoint.

In Figure 1 the sheets CL and b are held together, for example, by aLarssen-lock. The wedge 0 is positioned in the space-room between thelock-parts and connected thereto by the welded seams (Z and e.

In Figure 2 a counterwedge is arranged besides the wedge on the oppositeside of the lock-Joint in the space-room between the lockparts andconnected thereto in the same manner as the first mentioned wedge by twowelded seams, so that a rigid lock-joint without tensional stresses isobtained.

, What I claim and desire to secure by Letters Patent of the UnitedStates is:

l. A rigid lock-joint of sheet piles, consisting of engaged lock-parts,additional pieces positioned in the natural space-room between thelock-parts, and welded seams connecting the additional pieces to thelockparts.

2. A rigid lock-joint of sheet piles, consisting of engaged lock-parts,wedge-shaped additional pieces positioned in the natural space-roombetween the lock-parts, and welded seams connecting the additionalpieces to the lock-parts.

3. A rigid lock-joint of sheet piles, consisting of engaged lock-parts,additional pieces positioned at either side of the lockjoint in thenatural space-room between the lock-parts, and welded seams connectingthe additional pieces to the lock-parts.

4. A rigid lock-joint of sheet piles, consisting of engaged lock-parts,wedge-shaped additional pieces positioned at either side of thelock-joint in the natural space-room between the lock-parts, and welded.seams connecting the additional pieces to the lockparts.

5. A rigid lock-joint of sheet piles, consisting of engaged lock-parts,wedge-shaped additional pieces positioned in the natural space-roombetween the lock-parts, and welded seams at either side of theadditional pieces connecting the additional pieces to tllo lock-parts.

6. A rigid lock-joint of sheet piles, consisting of engaged lock-parts,wedge-shaped additional pieces positioned at either side of thelock-joint in the natural space-room between the lock-parts, and weldedseams at either side of the additional pieces connecting the additionalpieces to the lockparts.

7. Sheet piling composed of locked piles having additional piecespositioned in the natural space-room between the lock-parts and Weldedto the lock-parts.

8. Sheet piling composed of locked piles having additional piecespositioned at either side of the lock in the natural space-room betweenthe lock-parts and Welded to the lock-parts.

In testimony whereof I afiix my signature.

ARTHUR FRICKE.

